Public bug reported: On Kubuntu 15.04 amd64, while running installer to upgrade to 15.10, the GUI froze at 89% complete and /var/log/dist-upgrade/main.log ended with the stack trace below. I indeed have a custom server.xml configuration for Tomcat, so it looks like it crashes when it needs to show the configuration dialog (use maintainers/existing/diff).
Yesterday on #kubuntu channel there was someone complaining about the same thing - his installer GUI froze at %80, and he found a similar stack trace in the log (I only know the last line of the trace was identical, didn't see the full stack trace). He said in his case it looks related to the sane (scanner package) custom configuration file dialog prompt. I think this is a pretty critical bug since an aborted OS upgrade is likely to render the system unusable for the average user, and it does little to encourage confidence of users in the OS distribution. 2015-10-24 14:34:12,360 DEBUG got a conffile-prompt from dpkg for file: '/etc/tomcat7/server.xml' 2015-10-24 14:34:12,362 DEBUG UI version is 4.0 2015-10-24 14:34:12,362 DEBUG uiname is dialog_conffile 2015-10-24 14:34:12,362 DEBUG toplevel widget is QDialog 2015-10-24 14:34:12,362 DEBUG setting property geometry 2015-10-24 14:34:12,362 DEBUG setting property windowTitle 2015-10-24 14:34:12,362 DEBUG setting property modal 2015-10-24 14:34:12,362 DEBUG push QDialog dialog_conffile 2015-10-24 14:34:12,362 DEBUG push QGridLayout gridlayout 2015-10-24 14:34:12,362 DEBUG setting property text 2015-10-24 14:34:12,362 DEBUG push QPushButton show_difference_button 2015-10-24 14:34:12,362 DEBUG pop widget QPushButton show_difference_button 2015-10-24 14:34:12,362 DEBUG new topwidget <PyQt5.QtWidgets.QDialog object at 0x7fd6799e39d8> 2015-10-24 14:34:12,362 DEBUG setting property sizePolicy 2015-10-24 14:34:12,362 DEBUG setting property text 2015-10-24 14:34:12,363 DEBUG setting property pixmap 2015-10-24 14:34:12,363 DEBUG setting property wordWrap 2015-10-24 14:34:12,363 DEBUG push QLabel textLabel2 2015-10-24 14:34:12,363 DEBUG pop widget QLabel textLabel2 2015-10-24 14:34:12,363 DEBUG new topwidget <PyQt5.QtWidgets.QDialog object at 0x7fd6799e39d8> 2015-10-24 14:34:12,363 DEBUG setting property text 2015-10-24 14:34:12,363 DEBUG setting property wordWrap 2015-10-24 14:34:12,363 DEBUG push QLabel label_conffile 2015-10-24 14:34:12,363 DEBUG pop widget QLabel label_conffile 2015-10-24 14:34:12,363 DEBUG new topwidget <PyQt5.QtWidgets.QDialog object at 0x7fd6799e39d8> 2015-10-24 14:34:12,363 DEBUG setting property text 2015-10-24 14:34:12,363 DEBUG push QPushButton keep_button 2015-10-24 14:34:12,363 DEBUG pop widget QPushButton keep_button 2015-10-24 14:34:12,363 DEBUG new topwidget <PyQt5.QtWidgets.QDialog object at 0x7fd6799e39d8> 2015-10-24 14:34:12,363 DEBUG setting property text 2015-10-24 14:34:12,363 DEBUG push QPushButton replace_button 2015-10-24 14:34:12,363 DEBUG pop widget QPushButton replace_button 2015-10-24 14:34:12,363 DEBUG new topwidget <PyQt5.QtWidgets.QDialog object at 0x7fd6799e39d8> 2015-10-24 14:34:12,364 DEBUG push QTextEdit textview_conffile 2015-10-24 14:34:12,364 DEBUG pop widget QTextEdit textview_conffile 2015-10-24 14:34:12,364 DEBUG new topwidget <PyQt5.QtWidgets.QDialog object at 0x7fd6799e39d8> 2015-10-24 14:34:12,364 DEBUG pop layout QGridLayout gridlayout 2015-10-24 14:34:12,364 DEBUG pop widget QDialog dialog_conffile 2015-10-24 14:34:12,364 DEBUG new topwidget None 2015-10-24 14:34:12,365 ERROR not handled exception in KDE frontend: Traceback (most recent call last): File "/tmp/ubuntu-release-upgrader-7bai3dvc/wily", line 8, in <module> sys.exit(main()) File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeMain.py", line 240, in main if app.run(): File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeController.py", line 1837, in run return self.fullUpgrade() File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeController.py", line 1802, in fullUpgrade if not self.doDistUpgrade(): File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeController.py", line 1143, in doDistUpgrade res = self.cache.commit(fprogress,iprogress) File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeCache.py", line 267, in commit apt.Cache.commit(self, fprogress, iprogress) File "/usr/lib/python3/dist-packages/apt/cache.py", line 501, in commit # which is less than optimal! File "/usr/lib/python3/dist-packages/apt/cache.py", line 465, in install_archives File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeView.py", line 234, in run res = os.WEXITSTATUS(self.wait_child()) File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeViewKDE.py", line 451, in wait_child self.update_interface() File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeViewKDE.py", line 430, in update_interface InstallProgress.update_interface(self) File "/usr/lib/python3/dist-packages/apt/progress/base.py", line 252, in update_interface self.conffile(match.group(1), match.group(2)) File "/tmp/ubuntu-release-upgrader-7bai3dvc/DistUpgrade/DistUpgradeViewKDE.py", line 339, in conffile self.confDialogue.show_difference_button.clicked.connect(self.showConffile()) TypeError: argument 1 has unexpected type 'NoneType' 2015-10-24 14:34:12,366 DEBUG running apport_crash() 2015-10-24 14:34:12,393 DEBUG enabling apt cron job ** Affects: ubiquity (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509655 Title: installer crashed on custom configuration file dialog To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1509655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs